A mechanism for restraining movement of a locking pin

Abstract

A mechanism for restraining movement of a locking pin is disclosed. The mechanism includes a plurality of bushings 1. At least one of the plurality of bushings is provided in an aperture 76, 78 and on either ends of the locking pin 74. Further, at least one primary restraining mechanism 7 is configured in the at least one bushing 1 at one end of the locking pin 74, where the primary restraining mechanism 7 is fixedly connected to the at least one bushing 1 and is configured to restrain at least one of sliding and rotary movement of the locking pin 74.

1 . A mechanism for restraining movement of a locking pin  74 , the mechanism comprising:
 a plurality of bushings  1 , wherein at least one of the plurality of bushings is provided in an aperture  76  and on either ends of the locking pin  74 ;   at least one primary restraining mechanism  7  configured in the at least one bushing  1  at one end of the locking pin  74 , wherein the primary restraining mechanism  7  is fixedly connected to the at least one bushing  1  and is configured to restrain at least one of sliding and rotary movement of the locking pin  74 ;   
     
     
         2 . A mechanism as claimed in  claim 1 , comprising a secondary restraining mechanism  9  configured to be accommodated in a cavity defined in the locking pin  74 , wherein the secondary restraining mechanism  9  is removably coupled to the locking pin  74  through at least one of the bushing  1  and restrains the rotary movement of the locking pin  74 . 
     
     
         3 . A mechanism as claimed in  claim 1 , wherein the primary restraining mechanism  7  is at least one of a retention cap  7   a  and a threaded joint  7   b.    
     
     
         4 . A mechanism as claimed in  claim 2 , wherein the secondary restraining mechanism  9  is at least one of an anti-rotational pin  9   a,    9   c  and a retention ring. 
     
     
         5 . A mechanism according to  claim 3 , wherein the retention cap  7   a  is connected to at least one of the bushing  1  and the locking pin  74  by at least one of a first threading connection  5  and a retention pin  15 . 
     
     
         6 . A mechanism according to  claim 1 , wherein the at least one bushing  1  provided in the aperture extends along the length of the aperture  76 . 
     
     
         7 . A mechanism according to  claim 1 , wherein the at least one bushing  1  is provided on either ends of the aperture  76  defined in the spar structure  62 . 
     
     
         8 . A mechanism according to  claim 1 , wherein at least one of the plurality of bushings  1  provided at a top end (a) of the locking pin  74  and a bottom end (c) of the locking pin  74  are connectable to the locking pin  74  by a second threading connection  7   b.    
     
     
         9 . A mechanism according to  claim 1 , comprising a retaining ring  9   b  mounted over the retention cap  7   a,  wherein the retaining ring  9   b  is configured to receive and hold the locking pin  74 . 
     
     
         10 . A mechanism according to  claim 1 , wherein the cavity is defined with internal threads or a keyway to receive the anti-rotational pin  9  and the anti-rotational pin  9  is at least one of a splined pin  9   c  or a threaded pin  9   b.    
     
     
         11 . A wind turbine blade  10  having a profiled contour including a leading edge and a trailing edge with a chord having a chord length extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end, wherein the blade  10  comprises:
 a first blade segment  68  connected to a second blade segment  70  by a spar structure  62 ; 
 the spar structure  62  including a first part  64  housed in the first blade segment  68  and a second part  67  housed in the second blade segment  70 , wherein the first part  64  of the spar structure  62  is defined with a first aperture  76  and the second part  67  of the spar structure  62  is defined with a second aperture  78 ; 
 a locking pin  74  provided in the aperture  76 ,  78  for connecting the first part  64  and the second part  67  of the spar structure  62  and connecting the first blade segment  68  to the second blade segment  70 ; and a mechanism for restraining movement of the locking pin  74 , the mechanism comprising:
 a plurality of bushings  1 , at least one of the plurality of bushings is provided in each of the aperture  76  defined in the spar structure  74  and on either ends of the locking pin  74 ; 
 at least one primary restraining mechanism  7  provided in the at least one bushing provided at one end of the locking pin  74 , wherein the primary restraining mechanism  7  is fixedly connected to at least one of the bushing  1  and is configured to receive the locking pin  74  to restrain at least one of sliding and rotary movement of the locking pin  74 . 
 
 
     
     
         12 . A wind turbine blade  10  according to  claim 11 , wherein the locking mechanism further comprising a secondary restraining mechanism  9  configured to be accommodated in a cavity defined in the locking pin  74 , wherein the secondary restraining mechanism  9  is removably coupled to the locking pin  74  through the bushing  1 . 
     
     
         13 . A mechanism as claimed in  claim 11 , wherein the primary restraining mechanism  7  is at least one of a retention cap  7   a  and a threaded joint  7   b.    
     
     
         14 . A mechanism as claimed in  claim 11 , wherein the secondary mechanism  9  is at least one of an anti-rotational pin  9   a,    9   c,  wherein the anti-rotational pin  9   a,    9   c  is configured to restrain at least one of sliding and rotary movement of the locking pin  74 . 
     
     
         15 . A wind turbine blade  10  according to  claim 11 , wherein the retention cap  7   a  is connected to at least one of the bushings  1  and the locking pin  74  by at least one of first threading connection  5  and a retention pin  15 , 
     
     
         16 . A wind turbine blade  10  according to  claim 11 , wherein the at least one bushing provided in the aperture  76 ,  78  extends along the length of the aperture. 
     
     
         17 . A wind turbine blade  10  according to  claim 11 , wherein the at least one of the plurality of bushings  1  provided at a top end (a) of the locking pin  74  and a bottom end (c) of the locking pin  74  are connectable to the locking pin  74  by second threading connection  7   b.    
     
     
         18 . A wind turbine blade  10  according to  claim 11 , comprising a retaining ring  9   b  mounted over the retention cap  7   a,  wherein the retaining ring  9   b  is configured to receive and hold the locking pin  74 . 
     
     
         19 . A wind turbine blade  10  according to  claim 11 , wherein the cavity is defined with internal threads or a keyway to receive the anti-rotational pin  9  and the anti-rotational pin  9  is at least one of a splined pin  9   c  or a threaded pin  9   a.    
     
     
         20 . A method of assembling a wind turbine blade  10  having a profiled contour including a leading edge and a trailing edge with a chord having a chord length extending therebetween, the wind turbine blade  10  extending in a spanwise direction between a root end and a tip end, the method comprises:
 connecting a first blade segment  68  with a second blade segment  70  by a spar structure  62 , the spar structure  62  comprising a first part  64  housed in the first blade segment  68  and a second part  67  housed in the second blade segment  70 ; 
 aligning a first aperture  76  defined in the first part  64  with a second aperture  78  defined in the second part  67 ; 
 inserting a locking pin  74  in the first aperture  76  and the second aperture  78  of the first part  64  and the second part  67  and connecting the first blade segment  68  with the second blade segment  70  of the wind turbine blade  10 ; 
 providing a plurality of bushings  1  in the first and the second aperture  76 ,  78  of the spar structure  62  for housing the locking pin  74 ; 
 providing a primary restraining mechanism  7  configured in the at least one bushing  1  at one end of the locking pin  74 , wherein the primary restraining mechanism  7  is fixedly connected to the at least one bushing  1  and is configured to restrain at least one of sliding and rotary movement of the locking pin  74 ; 
 providing a secondary restraining mechanism  9  configured to be accommodated in a cavity defined in the locking pin  74 , wherein the secondary restraining mechanism  9  is removably coupled to the locking pin  74  through the bushing  1  and restrains the rotary movement of the locking pin  74 .